CN211335894U - Controllable air current wiper - Google Patents

Abstract

The utility model provides a controllable airflow windscreen wiper, which comprises an airflow windscreen wiper main body, a metal airflow guide pipe and an airflow control device, wherein the metal airflow guide pipe is arranged in an inner cavity of the airflow windscreen wiper main body and is communicated with an airflow emission hole formed on the airflow windscreen wiper main body; the air wiper main body is arranged on the front windshield of the automobile; the air flow control device is used for controlling the size of the air flow passing through the metal air flow guide pipe; the device has the functions of cleaning rainwater and icing, and can continuously wash away the rainwater on the windshield of the vehicle or timely digest an icing layer, thereby providing a clearer and safer driving view for a driver; the device is suitable for severe extreme weather, and has simple and practical functions.

Description

Controllable air current wiper

Technical Field

The utility model belongs to the technical field of driving tool safety guarantee and surface cleaning, concretely relates to controllable air current wiper.

Background

At present, more than 90% of the current general windscreen wipers on driving tools are not provided with controllable airflow emission devices, and when the driving tools are in heavy rain or low-temperature environments, the defects of the common windscreen wipers are exposed: in heavy rain, the front windshield cannot be kept clear continuously, or in a low-temperature environment, an ice layer can appear on the glass of a driving tool, so that the sight line of a driver is seriously influenced, and the occurrence rate of traffic accidents is improved accordingly.

Disclosure of Invention

An object of the utility model is to provide a controllable air current wiper has solved and has had above-mentioned not enough among the prior art.

In order to achieve the above purpose, the utility model discloses a technical scheme is:

the utility model provides a controllable airflow windscreen wiper, which comprises an airflow windscreen wiper main body, a metal airflow guide pipe and an airflow control device, wherein the metal airflow guide pipe is arranged in an inner cavity of the airflow windscreen wiper main body and is communicated with an airflow emission hole formed on the airflow windscreen wiper main body; the air wiper main body is arranged on the front windshield of the automobile; the gas flow control device is used for controlling the gas flow passing through the metal gas flow conduit.

Preferably, the air flow wiper main body is a triangular prism, and a plurality of air flow emission holes are uniformly distributed on one side of the air flow wiper main body.

Preferably, an inclined angle of 15 ° is provided between the center line of the airflow emission hole and the axis of the airflow wiper body.

Preferably, the airflow control device comprises a strain sensor, a computer, a direct current power supply, a servo motor and an air pump, wherein the strain sensor is mounted on the top of the vehicle and is connected with the computer through an A/D conversion unit; and the direct current power supply is respectively connected with the strain sensor, the computer and the servo motor.

Preferably, a holder is disposed between the D/a conversion unit and the servo motor.

Preferably, the strain sensor comprises a bearing plate, a base and an induction arm, wherein one end of the induction arm is fixed on the base, and the other end of the induction arm is fixedly connected with the bearing plate; and a resistance strain gauge is arranged on the induction arm.

Preferably, a full bridge circuit is arranged in the sensing arm.

Preferably, a heating resistance wire is arranged in the inner cavity of the metal airflow guide pipe, and the heating resistance wire is connected with the airflow control device.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a controllable air current wiper, through the gas that the control of air current controlling means gets into in the metal air current pipe, thereby realize different environmental requirements, and then make this device have clean rainwater and icy function, can wash the rainwater on the vehicle windshield uninterruptedly continuously, or timely with the layer digestion that freezes, thereby provide a clearer, safer driving vision for the driver; the device is suitable for severe extreme weather, and has simple and practical functions.

Drawings

Fig. 1 is a structure view of a main body of an airflow wiper;

FIG. 2 is an enlarged view of the main structure of the air wiper;

FIG. 3 is a schematic diagram of a strain gauge sensor;

FIG. 4 is a schematic view of a heating resistance wire;

FIG. 5 is a schematic view of a sensor arm;

FIG. 6 is a schematic circuit diagram of the present invention;

fig. 7 is a full bridge circuit diagram.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 to 7, the present invention provides a controllable airflow wiper, which includes an airflow wiper main body 1, a metal airflow duct 2, a heating resistance wire 3, a dc power supply 4, a computer 5, a servo motor 6, a D/a conversion unit 7, an a/D conversion unit 8, a strain sensor 9, an air pump 10, a retainer 11 and a tachogenerator 12, wherein the metal airflow duct 2 is installed inside the airflow wiper main body 1, and the heating resistance wire 3 is installed inside the metal airflow duct 2; the strain sensor 9 is connected with the direct current power supply 4 through a lead; the computer 5 converts the digital control quantity into an analog control quantity through a D/A conversion unit 7 and sends the analog control quantity to the servo motor 6; the servo motor 6 is connected with an air pump 10 in a driving way.

The lower part of one side of the air flow wiper main body 1 is provided with an air flow emission hole 1-1 with the diameter inclined downwards by 15 degrees, and an internal port of the air flow emission hole 1-1 is communicated with the metal air flow guide pipe 2.

The metal airflow conduit 2 is used for conveying high-pressure airflow output by the servo motor 6 to do work on the air pump 10.

Two ends of the heating resistance wire 3 are connected with a power supply through a lead.

The strain gauge sensor 9 converts the output voltage signal into digital quantity through the A/D conversion unit 8 and transmits the digital quantity to the computer 5.

The air flow wiper main body 1 is arranged on the front windshield of an automobile, and the strain sensor 9 is arranged at the horizontal position of the top of the automobile.

The air flow wiper main body 1 is a triangular prism, and the air flow emission holes 1-1 are uniformly distributed on one side of the air flow wiper main body 1.

The strain sensor 9 comprises a bearing plate 3-1, a base 3-2, an induction arm 3-3 and a resistance strain gauge 4-1 fixedly connected on the induction arm 3-3, wherein one end of the induction arm 3-3 is fixed on the base 3-2, and the other end of the induction arm is fixedly connected with the bearing plate 3-1.

The induction arm 3-3 is of a bent structure, and two resistance strain gauges 4-1 with the same size and characteristics are respectively paved on the upper surface and the lower surface of the horizontal section of the induction arm 3-3.

The base 3-2 is provided with foam rubber; the strain gauge sensor 9 is fixed to the roof of the vehicle by foam rubber.

A full-bridge circuit 4-2 is arranged in the induction arm 3-3.

Referring to fig. 6, an output end B, D of the strain gauge sensor 9 is connected to the a/D conversion unit 8 through a wire, a power supply end A, C is connected to the dc power supply 4 through a wire, a digital output port of the a/D conversion unit 8 is connected to a digital input port of the computer 5, a digital output port of the computer 5 is connected to a digital input port of the D/a conversion unit 7, a digital output port of the D/a conversion unit 7 is connected to an input port of the holder, an output port of the holder 11 is connected to the servo motor 6, the tachogenerator 12 is connected to a rotating shaft of the servo motor 6 through a linkage mechanism, and a voltage output end of the tachogenerator 12 is connected to an analog input port of the a/D conversion unit.

The system detects continuous analog quantity of an external environment through a strain sensor 9, the detected continuous analog quantity is converted into a discrete digital signal which can be identified by a computer 5 through an A/D conversion unit 8, the discrete digital signal is processed by the computer, a control instruction is sent out by the computer, and the control instruction is converted into the continuous analog quantity (control voltage and current signals) through a D/A conversion unit 7 and a retainer 11, so that the starting, stopping and speed regulation of a servo motor are controlled; in the feedback link, the tachogenerator 12 converts the detected speed signal into a voltage signal through detecting the rotating speed of the servo motor 6, the voltage signal is an analog quantity, the analog quantity is converted into a discrete digital quantity through the A/D conversion unit 8 at the moment, the difference is made with positive given input through negative feedback, the difference result is input into a computer, the system stability can be increased through the negative feedback link, the runaway phenomenon of the servo motor 6 is prevented, and the control precision is improved.

Referring to fig. 7, a differential full-bridge circuit is adopted, a power supply end A, C is connected with a dc power supply 4 through a wire, an output end B, D is connected with an a/D conversion unit 8 through a wire, and when the sensing arm (3-3) does not bear an external force, no mechanical deformation is generated, that is, the resistance value of the resistance strain gauge (4-1) does not change, at this time, R1-R2-R3-R4 satisfy a balanced bridge condition, so that an output voltage Uo is 0; when the induction arm (3-3) is mechanically deformed under the influence of external force, the resistance value variation amounts of R1, R2, R3 and R4 are respectively delta R1, delta R2, delta R3 and delta R4, and the output voltage Uo is E.delta R1/R1.

The device is divided into two parts, namely a device main body airflow windscreen wiper main body, a metal airflow guide pipe, a heating resistance wire, a direct-current power supply, a computer, a servo motor, a D/A, A/D part and a strain type sensor of the sensor, when the device is used, foam rubber is torn, the top of a vehicle is leveled, and a strain type sensor base 3-2 is bonded on the vehicle. The direct current power supply of the device main body is switched on, namely the sensor circuit is conducted, and at the moment, the strain gauge sensor is in a working state; when the bearing plate 3-1 of the strain sensor is acted by external force, the acting force is transmitted to the sensing arm 3-3, four resistance strain gauges 4-1 are arranged on the sensing arm 3-3, the resistance strain gauges can be mechanically deformed when the acting force is acted, and the resistance value of the resistance strain gauges can be correspondingly changed, and a full-bridge differential circuit is adopted to connect the resistance strain gauges into a circuit shown in figure 5 so as to realize the linear change relationship between the input value and the output value of the sensor; the heating resistance wire can be switched on or off in the circuit.

When the strain sensor 9 detects that the rainfall of the external environment increases, the rainfall of the external environment is detected, the detection result is transmitted to the computer 5 in the form of an electric signal, the computer 5 issues a corresponding control instruction according to external detection information to control the acting of the servo motor 6 on the output airflow, and the controllability of the flow and the flow speed of the airflow emitted by the airflow emitting hole 1-1 is realized, so that the rainwater is continuously washed away; when the automobile glass is in a low-temperature environment, an ice layer can be generated outside the automobile glass, at the moment, the airflow heated by the heating resistance wire is emitted from the airflow emission hole 1-1, and the airflow acts on the ice layer, so that the ice layer can be rapidly digested, and a clearer and safer driving visual field is provided for a driver.

The following embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention are within the protection scope of the present invention.

Claims (8)

1. A windscreen wiper capable of controlling air flow is characterized by comprising an air flow windscreen wiper main body (1), metal air flow guide pipes (2) and an air flow control device, wherein the metal air flow guide pipes (2) are arranged in an inner cavity of the air flow windscreen wiper main body (1) and are communicated with air flow emission holes (1-1) formed in the air flow windscreen wiper main body (1); the air wiper main body (1) is arranged on the front windshield of an automobile; the air flow control device is used for controlling the size of the air flow passing through the metal air flow guide pipe (2).

2. The windscreen wiper device as set forth in claim 1, wherein said wiper body (1) is a triangular prism, and said plurality of air emission holes (1-1) are uniformly distributed on one side of said wiper body (1).

3. A controllable air flow wiper blade according to claim 1 or 2, characterised in that a 15 ° angle of inclination is provided between the centre line of the air flow emission aperture (1-1) and the axis of the wiper body (1).

4. The windscreen wiper with the controllable airflow as claimed in claim 1, wherein the airflow control device comprises a strain gauge sensor (9), a computer (5), a direct-current power supply (4), a servo motor (6) and an air pump (10), wherein the strain gauge sensor (9) is mounted on the top of the vehicle and is connected with the computer (5) through an A/D (analog/digital) conversion unit (8), the computer (5) is connected with the servo motor (6) through a D/A (digital/analog) conversion unit (7), and the servo motor (6) is in driving connection with the air pump (10) mounted at the inlet of the metal airflow guide pipe (2); the direct current power supply (4) is respectively connected with the strain gauge sensor (9), the computer (5) and the servo motor (6).

5. A controllable air flow wiper blade according to claim 4, characterised in that a holder is arranged between the D/A converter unit (7) and the servo motor (6).

6. The windscreen wiper with the controlled air flow as set forth in claim 4, wherein the strain gauge sensor (9) comprises a bearing plate (3-1), a base (3-2) and a sensing arm (3-3), wherein one end of the sensing arm (3-3) is fixed on the base (3-2), and the other end is fixedly connected with the bearing plate (3-1); and a resistance strain gauge (4-1) is arranged on the induction arm (3-3).

7. A controllable airflow wiper blade according to claim 6, characterized in that the sensing arm (3-3) is provided with a full bridge circuit (4-2).

8. The windscreen wiper with the controllable airflow as set forth in claim 1, wherein a resistance heater (3) is disposed in the inner cavity of the metal airflow duct (2), and the resistance heater (3) is connected with an airflow control device.

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